Product Introduction
Process Panel 846A (PP846A 3BSE042238R2)is an all-in-one operator workstation that integrates a top-of-the-line industrial computer and a large, high-quality touchscreen display. Designed to provide the most demanding applications with superior computing performance, a large viewing area, and an exceptional user experience, it is suitable for main console locations where large amounts of information need to be monitored simultaneously.
Technical Specifications
|
Manufacture |
ABB |
|
Model |
PP846A |
| Part Number | 3BSE042238R2 |
|
Description |
Key Panel, 10.4" |
|
Origin |
Sweden |
|
Dimension |
40*25*5cm |
|
Weight |
2.5 kg |
Product Details
The PP846A 3BSE042238R2 operator panel has galvanic isolation against the 24 V DC feed but no galvanic isolation between the communication ports for RS232, RS422/485, and USB. Only the Ethernet connection has galvanic isolation.
When a PC is connected to the panel, the panel's internal 0 V (GND) will be connected to the protective ground via the PC. Several USB devices can have the shield connected to the protective ground. Here, the panel's 0 V (GND) is connected to the protective ground when, for example, a USB memory stick, keyboard, or similar device is plugged in.
If several units are connected that have a 0 V and a ground connection, and these are connected to various grounding points, there is a substantial risk of problems. Grounding currents go through communication cables, the rear plate of the controller, and internally in the operator panel, and can cause errors.
Use external units to improve communication and achieve galvanic isolation. Westermo has good industry-standard insulators that are also insulated from the 24 V DC feed.
Most of the operator panels are fed with 24 V DC.
1. If you use a power supply that meets safety standards and only feeds the operator panel, there is no problem.
2. However, if you have a 24 V unit that also feeds other units, there is reason to be cautious.
The operator panel does not have insulation that meets safety requirements in the event of a potential short circuit between 230 V AC and 24 V DC. It is assumed that the 24 V feed is secure, for example, SELV according to EN 60950 (protection against electric shock) and UL 950.
3. If there is a substantial distance between the relay contacts for 24 V DC and 230 V AC, it is OK to use the same 24 V devices for all feeds.
4. Connect 0 V on the 24 V feed to the ground. This offers three advantages:
– Safety is increased. The 24 V feed will not be live in the event of a faulty connection or short circuit between 0 V (24 V) and 230 V phase.
– Transients on the 24 V feed are connected to the ground.
– No risk that the 24 V feed is at a high level in relation to the ground. This is not unusual since there is high static electricity.
The release history of the Panel 800 is presented below：
| Version | Description | User documentation |
| 4.1 | Initial release of the Panel 800 and firmware version 1.0. | 3BSE043450R101 (MA00796) |
| 5.0 | Release of firmware version 2.0 with support for MMS Alarm and Event and PROFIBUS-DP slave interface (CB801). | 3BSE043450R201 |
| 5.0/1 | Release of firmware version 3.0. | 3BSE043450R301 (MA00796A) |
| 5.1 | Release of firmware version 4.0. | 3BSE043450R401 (MA00796B) |
| 5.1/3 | Release of PP846A | 3BSE043450R501 |
